Heater.



J. E. MILNER 6: J. M. OALLAHAN.

HEATER. APPLICATION FIL'ED JAN. 16, 1913 Patented Nev. 10, 1914 w A. F m W M d m Ma ,5

osFioE.

" nun JOmN M. oeLLAHAN. or'can'ro'u, OHIO.

HEATER.

To (til 101mm if; nmg concern:

Be known that we, James E; Mnrxnn and Join fill. (impairing both citizens of the United Stat residing at Canton, in the county of andci do of Ohio, have invented a new and H 'ul Heater, of which the following is a ro ation.

Qur invention relates to improvements in heaters and while applicable to heaters of various kinds and forwarious pdrposes, is especially adapted for heaters used in heat ing inclosures, such as automobile garages where; may be present an atmosphere containing combustible or explosive gases, dust and the lil The objects of the invention are, to generally improve heaters of the character mentioned, to obtain a combination of economy and eificicnby in operation, together with simplicity of construction and convenience in control, one of the prime objects being safety and insurance against fire and explosions. These objects, together with other objects readily apparent to those skilled in the art, may be attained by the construction disclosed in the accompanying drawings, althrough the invention. maybe embodied in other forms. the construction illustrated being chosen by way of example.

In the drawings Figure l is a perspective view of a heater embodying our invention and using gas for fuel. said view also including the vent and air intake pipes with parts brol ten away. Fig. 2 is a vertical sectional view througl'l the upper end of said rent and intake pipes. Fig. is a perspective view of the heater withlhe near side and front of the outer casing ren'ioved. l is a vertical longitudinal section through the heater taken on the line +-4 of Fig. 6. Fig. 5 is a horizontal section taken on the line 5 '5 of Fig. 4i Fig.3 is a vertical transverse section through the he: ter taken on the line i6 of Fig. 4.

hro ughout the several views similar reference numerals indie. to similar parts. More specifically describing the construction disclosed in said drawings, the numeral 1 indicates the front, the numeral 9 the sides and 3 the back of the outer casing. The said front is preferably formed of a cast plate, although sheet metal may be used if desired. The sides and back are preferahly formed of sheet metal and the front through the heater Specification of Letters Patent.

is provided with the door opening 4 and gas pipe openings 5 and 6. The front 1 is formed with the integral flanges 7 at the sides and top and an angle iron frame 8 is provided for supporting the sides 2 and the back 3 as well as the front. Suitable supports, such as the iron legs 9 are provided for raising said frame 8 above wire screen or fabric 10 extends across the top of the outer casing, said casing is open. Within said outer casing is an inner casing comprising a fire box 11, flue 12, circulatingbox 13 and air su ply duct 14. These parts are preferab y formed of sheet metal and are laterally spaced from the sides 2, as clearly illustrated in Figs. 5 and 6.

. The fire box is provided with atransverse horizontal floor 15, above which is the flame chamber and below which is th air mixing chamber. The sides 16, top 17 and bottom 18 of the fire box are connected to each other and to the front 1, the said bottom 18 extending rearwardly in horizontal position to a point adjacent the back 3. The top 17 extends from the front 1 backward more than half the distance to the back 3, then curves downwardly and rearwardly and is connected to the rear end of the fioorl5, whence said top continues rearwardly, parallel to the bottom 18. i The sides 16 are connected to the front 1 and to the top 17 and bottom 18, completing the inclosure of the fire box,

including the flame chamber and air mixing chamber. the sides, top and bottom and between said Patented N 0v. 10, 1914. I l Application filed. January 16, 1914. Serial No. 812,513.

The joints between parts and the front lfare carefully made.

and hermetically sealed and the interior of the flame chamber, including the floor, sides and top are preferably lined with asbestos 19. The door opening 4 gives access to the interior of the flame chamber and a suitable door 20, )referably lined with asbestos and provided with a. mica window 21 is provided and preferably connected to the front 1 as by means of the hinges 22 and latch 23 in such way as to be drawn tight upon the edgcsof the opening 4 to hermetically close the same. Where the floor 15 is connected to the top 17, said floor is extended downwardly and frontwardly beyond said connection, forming an inclined deflector 24 adapted to direct the incomingair downwardly toward the bottom 18 as it passes Tapped into the manifold 25 are three from the air duct portion to the air mixing portion of the fire box.

l vitlnn the an mixing portion oi the fire box is arranged the manifold 25 which pret' erably rests upon the bottom 18 and is connected, as by means of the pipe 26 tending through the opening 5, with a gas gas burners 29 which extend upwardly through the fioor 15, the air mixing portion thereof, however, being lo iatcd heloi said lloor. The

supply pipe 27 provided with a valve 1 floor is also provided with auxiliary openings 30 for supplying air to said burners at their tops or gas orifices.

Forming suitable connection with the pipe 27 is an auxiliary pipe 31, which extends through the opening 6 into the air mixing chamber, thence upwardly through one of the openings 30, and has lts open end ar:

ringed above and closely adjacentrto one 'of the burners 29, the purpose of said pipe being to provide a pilot light. It will be understood that the pipes 26 and 31 are heradjacent the back 3 and comprises the front- 32, sides 33 and back 3-twhich are connected-to each other with hermetically sealed joints. At the lower end said sup ly duct con'imimicatcs with the rear end 0 "the air mixing chamber of the fire box, the connect- 'ing 3o1nts beinghermetically sealed. At the upper end of the supply duct is provided a cap 35 which closes the upper end of said duct and provides connection for the air supply pipe 36 which extends upwardly and through the wall or root 36 of the building to the outside air.

Above the top of the fire box the circulat lug box 13 comprising the bottom 37, sides 38 and top 39 extends horizontally from the front. 1, which hermetically closes the forward end of said box to the front 32 f the air-supply duct, which hermetically closes the rear end of said box except for the vent pipe hereinafter described. The top 39 is wider than the bottom 37, so that the sides 38 are inclined upwardly and outwardly, the side edges of thon top 39, however. being spaced from the sides 2 of the outer casin as clearly illustrated in Fig.6. be noted that the top 39 is spaced down Wardly from the screen 10.

The tlueiQ, extending from the fire box 11, midway between the ends of the flame chamber, communicates with the circulating he 13 th-roughthe bottom 37' of which it extends, 'all.ot the joints in the said due 12' and between .;aid fine and the circulating box being hermetically sealed.

It should also m sses Vlithin the circulating, box 1;) is a front bafi'ie plate 40 and a rear balllc plate 41. The front plate is coni'icctcd to the bottom 37 and sides $.18 and extends, from a point to the rear of the tlnc l2 forwardly and upwardly in inclined position over the top of said tlue to a point adjacent the top 39 to the front oi" said line. The rear batile plate ll is connected to the top 39 andisides 3S and extends downwardly and backwardly in inclined position to a point adjacent the bottom 37 of the circulating box and front 32 of the air supply duct. Adjacent the top 39, the rear end of the circulatiin: box 13, coinposed of the front 32 oi the a'r supply duct. is provided with an pcuinp' t, with which is connected thc vent pipe H which is of smaller diameter than the air supply pipe 36 and extends outwardl i' into the air supply duct, and thence upwardly through said air supply duct and air supply pipe 36, the walls of the )ipcs .3 and 36 being spaced from each tlt lltl', as clcarl illustrated in Figs. 2 and i. It will he understood thatthe pipe 43 is hermetically scaled at the opening 42 to the front 32.

When the heater is in operation the ashestos lining 19 will prevent over-heating of the sides or top of the flame chamber so as to prevent ignition of combustible or explosive gases coming in contact with the outside of the'fire box. The products of combustion pass upwardly through tlic tlue 12 into the circulating box 13, where they strike the bafile plate 40 and are deflected frontwardly and upwardly, impingingupon the top 239 and sides 38 and thence. over the top edge of the plate it? rearwardly through the main body of the circulating; box to the bafiie date 41, which dellcctstbc burned gases and heat ed products ol combustion downwardlv. causing the same to impinge upon the sides 33 and bottom'37, whence they more upwardly and discharge through the opening 4:? into the vent pipe 43.

The supply of air for supporting combos tion at the burners 29 descends from the air supply pipe 36 downwardly throug'hthe air supply duet 1i at the rear. tlicnce forwardly through the lower part of the tire box, striking the deflector 2!, which causes the air to move downwardly to pass under the forward, free edge of said deflector into the mixing chamber. 'lheucc the air enters the burners 29 i the well known manner and a portion of said air passes upwardly through the auxiliary openings 30 into the lame chamber to supply air therein for the coinplction of combustion.

' The air' supply pipe 36, with the vent pipe arranged intcriorly. extends to the out side oi the inclosure, within which the heater is arranged, in order to secure a. sup plv of outside air for combustion and to discharge the burned gases and products i of said vent 'a' ltree opening at all times.

5 Lil-$6,832

of combustion into the outer air. Various devices may be employed at the outer ends and air intake pipes to prevent oi snow and rain and preserve lVe prefer, illustrate in be noted that the entrance however, the construction.

Figs. 1 and 2 in which it will the vent pipe l3 is extended outwardly beyond the end of the air supply pipe 36, the said pipe l3 being provided with a conical cowl. H such as commonly employed in ventilators and the like Closely surrounding the pipe l3, above the upper end of the pipe 36, is an inclined flange 45 ct sheet metal which extends outwardly to a diameter greater than the external diameter of the pipe 36 and at its edges is connected to the depending circular apron 4E6 extending down over the upper end of the pipe 36 and spaced therefrom. as clearly shown in Fig. 2. Suitable spacing brackets connected to said apron 46 and the pipe 36 serve to maintain said apron and pipe in proper rel.- ative position and said apron may be provided with auxiliary apertures 48, if de-v of air and pre-' sired, to permit entrance vent back drafts when the wind "is blowing. It will thus be seen that the air for supporting combustion, entering between the pipe 36 and apron 46 and descending through the pipe 36 will be heated by contact with and radiation from the vent pipe 43 carrying the hot burned gases and products ofcombustion. As said air passes downwardly through the pipe 36 it be comes more and more heated as it will be understood that the pipe 4.3 is more highly heated at the lower end. \Vhen the air is in. theduct l-l it is further heated by contact with the portion of the front of said duct -which forms the rear end of the circulating box 13. It will also be understood that the air supply duct is within the outer casing of the heater and by the time the air reaches the mixing chamber it is heated sufficiently to produce perfect combustion and maximum efliciency.

It is a well known fact that in the burning of gas a large amountof water is formed which, in the presence of cold atmosphere or surfaces will condense and gather in liquid form. By preheating the air, however, and by the peculiar form and construction of our heater all of the water operation the air it is arranged will formed by combustion is carried oil as vapor and exhausted through the vent pipe 43 into the outside air. sary to provide vtor drawing of? the water formed in. liquid state or providing other means of drainane. When the heater is-in of the inclosure in which be heated both by radia tion and conduction, cool air entering the outer casing at the bottom and passing hetvreen said outer casing and the fire box 11 making it unnecesupwardly, over and around.- said fire box,

coming in contact with the flue 12 and the sides 38 of the circulating box and thence passing upwardlyandoutwardly through the screen 10. 'The convection thus produced accomplishes a rapid diffusion of heat throughout the garage or other inclosure. Danger from ignition or combustion of explosive, gases, dust and the like within such inclosure is prevented, and the atmosphere is not contaminated in any way. This feature is of special importance, as it has frequently been a source of objection to heaters, especially those employing gas for fuel, that the atmosphere of the inclosure, room and the like is rendered unwholesome, Whereas it will be noted that our invented heater is capable of heating the said atmosphere without utilizing anyof it to support combustion or discharging any of the products of-combustion in such way as to change the character of such atmosphere.

Although the drawings and above specification disclose the best mode in which we have contemplated embodying our invention, we desire to be not limited to the details of such disclosure, for inany changes in form and construction may he made, as cir cumstances require or experience suggests, without departing from the spirit of, the invention, within the scope of the appended claim.

We claim A heater comprising an elongated outer casing formed of side and end walls and open at the top and bottom for the circulation of air therethrough and an inner casing comprisinga fire box, a fine, a circulating box and an air supply duct all arranged ;within and spaced from the side walls of said outer casing, said fire box horizontally disposed at the lower portion of said outer casing and comprising a lower, air mixing chamber extending from front to rear of said outer casing, and the forward portion. of said fire box being of greater height than the rear portion and being divided by a horizontzil, perforated floor defining an upper flame chamber, said circulating box horizontally disposed and upwardly spaced from said fire box, a vertical flue connecting said flame chamber with the forward 7 end of said circulating box, baffle plates within said circulating box adapted to cause tortuous travel of waste gases therethrough, a vent pipe connected to the rear end of said circulating box and adapted to dis charge waste gases therefrom, and said air supply duct vertically disposed within said outer casing at the rear end thereofand opening at its lower end into the rear end of said air mixing chamber, gas burners within said flame chamber and having air mixing portions extending through and below said perforated floor into said air mixing cham- I metically sealed, excep for the entrance of have hereunto subscribed our names inthe presence of two wltnesses.

JAMES E. MILNER. JOHN M. GALLAHAN.

Witnes ses ABRAM W. AGLER, VILLTAM H. MILLER.

gas and air and the exhaust of Waste gases, as described.

In testimony that we cl aim the aboy'e,4we 

